Macleesh Posted August 22, 2023 Report Share Posted August 22, 2023 My 70 CP car has no inertia switch and I can find no evidence of there ever having been one. I assume there would be a pair of wires joined near the wiper motor at least but there's no sign of them. Did all PI cars have them? I guess I need to start thinking about installing one. Sean Quote Link to post Share on other sites
Kevo_6 Posted August 22, 2023 Report Share Posted August 22, 2023 Hi Sean, the very early TR6 did not have them fitted but not sure what year they were introduced. Definitely a must to install one. Quote Link to post Share on other sites
stuart Posted August 22, 2023 Report Share Posted August 22, 2023 (edited) Fitted from body number 51399CP r/hand drive and 52328CP l/hand drive cars so late 1970. Stuart. Edited August 22, 2023 by stuart Quote Link to post Share on other sites
Mike C Posted August 22, 2023 Report Share Posted August 22, 2023 7 hours ago, Macleesh said: My 70 CP car has no inertia switch and I can find no evidence of there ever having been one. I assume there would be a pair of wires joined near the wiper motor at least but there's no sign of them. Did all PI cars have them? I guess I need to start thinking about installing one. Sean My 1969 CP didn't have one fitted ex stock but I retro fitted one from an XJ6. These days I'd certainly fit a modern , more reliable inertia switch if it was missing. Quote Link to post Share on other sites
Macleesh Posted August 23, 2023 Author Report Share Posted August 23, 2023 17 hours ago, stuart said: Fitted from body number 51399CP r/hand drive and 52328CP l/hand drive cars so late 1970. Stuart. That explains it, my commission number is just before that. Thanks. Quote Link to post Share on other sites
Waldi Posted August 23, 2023 Report Share Posted August 23, 2023 I have a 1970 TR6 (no switch) but fitted a new one with a relais to unload the ignition switch. I bought a new switch from Revington, it came with the special waterproof plug. Off course this is more expensive than a used item, but given the issues reported with old switches on here, that was on easy decision for me. Waldi Quote Link to post Share on other sites
Macleesh Posted August 24, 2023 Author Report Share Posted August 24, 2023 On 8/23/2023 at 3:33 PM, Waldi said: I have a 1970 TR6 (no switch) but fitted a new one with a relais to unload the ignition switch. I bought a new switch from Revington, it came with the special waterproof plug. Off course this is more expensive than a used item, but given the issues reported with old switches on here, that was on easy decision for me. Waldi I'll take a look on their website. I've also just fitted a relay having burnt out my ignition switch, saw an improvement from 9.3v to 10.2v across the pump as a result. Quote Link to post Share on other sites
Waldi Posted August 25, 2023 Report Share Posted August 25, 2023 Very good. When I measured the voltage drop, I did 2 measurements (best done with running engine): 1) Between bolt of the positive connection and body. It will be a bit less than battery voltage; 10.2V seems low but I have not checked mine for a couple of years. 2) Between the bolt of the negative connection on pump and the body: this will show if you have a proper earthing. It should be close to zero. In this way, you can check losses in the “feed” and “return” of the electrical system. Waldi Quote Link to post Share on other sites
RobH Posted August 25, 2023 Report Share Posted August 25, 2023 10.2 V is rather low and shows you still have a voltage-drop problem. Maybe the wire you have used to feed the pump isn't thick enough? Quote Link to post Share on other sites
Mike C Posted August 25, 2023 Report Share Posted August 25, 2023 And have a look at the pump earth. Quote Link to post Share on other sites
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